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All Journal Telematika Jambura Journal of Mathematics Community Development Journal: Jurnal Pengabdian Masyarakat Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Postulat : Jurnal Inovasi Pendidikan Matematika Journal of Fundamental Mathematics and Applications (JFMA) Jurnal Pengabdian dan Pemberdayaan Masyarakat Indonesia International Journal of Computing Science and Applied Mathematics-IJCSAM
Mohammad Ghani
Universitas Airlangga
Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Health Professions Mathematics Public Health Social Sciences Other

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NUMERICAL RESULTS OF MIXED CONVECTION FLOW OVER A FLAT PLATE WITH THE IMPOSED HEAT AND ANGLE OF INCLINATION Mohammad Ghani
Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi EULER: Volume 9 Issue 2 December 2021
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/euler.v9i2.11782

Abstract

In this paper, the numerical results of mixed convection flow over a flat plate with the imposed heat and different angles of inclination are established by applying the finite difference method of Crank-Nicolson. We further compare these numerical results with the case of non-mixed convection flow.  The velocity and temperature profiles are decreased when the different values of the Prandtl number (Pr) are increased. Meanwhile, the velocity profiles are increased, when the different values of angle of inclination (alfa) and mixed convection parameter (lambda) are increased. The mixed convection flow case (lambda=1.5) is affected by the external force, so the velocity of convection flow is higher than the non-mixed case (lambda=0).
Stability of Traveling Waves to a Burgers Equation with 2nd-Order Nonlinear Diffusion Mohammad Ghani
Jambura Journal of Mathematics Vol 4, No 1: January 2022
Publisher : Department of Mathematics, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1278.254 KB) | DOI: 10.34312/jjom.v4i1.11748

Abstract

We are interested in the study of asymptotic stability for Burgers equation with second-order nonlinear diffusion. We first transform the original equation by the ansatz transformation to establish the existence of traveling wave. We further employ the energy estimate under small perturbation and arbitrary wave amplitude. This energy estimate is then used to establish the stability.
FREE CONVECTION FLOW OVER A HORIZONTAL POROUS FLAT PLATE WITH THE EFFECT OF MAGNETOHYDRODYNAMICS Mohammad Ghani
Journal of Fundamental Mathematics and Applications (JFMA) Vol 4, No 2 (2021)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1419.413 KB) | DOI: 10.14710/jfma.v4i2.11719

Abstract

We are interested in study of the velocity (????′) and temperature (????) profiles for fluid flow over the surface of porous flat plate with the effect of magnetohydrodynamics. The dimensional equations are first transformed into the non-dimensional equations. Then, we transform the non-dimensional equations into the similar equations using stream functions. The numerical results are based on the discretization of similar equations using the finite difference method of Keller-Box. Based on the numerical results, the velocity profiles (????′) decrease when the viscoelastic parameter (????), Prandtl number (????????), magnetic parameter (????), porosity parameter (????) are increased. Moreover, the temperature profile (????) is increased when the viscoelastic parameter (????) and magnetic parameter (????) are increased. However, the temperature profile (????) decreases when Prandtl number (????????) and porosity (????) are increased.
Iterative Method of Thomas Algorithm on The Case Study of Energy Equation Mohammad tafrikan; Mohammad Ghani
Postulat : Jurnal Inovasi Pendidikan Matematika Vol 3 No 1 (2022)
Publisher : Universitas Muhammadiyah Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30587/postulat.v3i1.4346

Abstract

Implicit method is one of the finite difference method and is widely used for discretization some of ordinary or partial differential equations, such like: advection equation, heat transfer equation, burger equation, and many others. Implicit method is unconditionally stable and has been proved with the approximation of Von-Neumann stability criterion. Actually, implicit method is always identical to block matrices (tri-diagonal matrices or penta-diagonal matrices). These matrices can be solved numerically by Thomas algorithm including Gauss elimination using pivot or not, backward or forward substitution. Furthermore, it can be also solved using LU decomposition method with the elimination of lower triangle matrices first and then the elimination of upper triangle matrices. In this research, Thomas algorithm is used to solve numerically for the problem of convective flow on boundary layer, especially for energy equation with the variation of Prandtl number ( ).
ESKALASI KEMAMPUAN MENGOLAH DATA BAGI KADER DESA MENGGUNAKAN TEKNOLOGI INFORMASI Ratih Ardiati Ningrum; Chandrawati Putri Wulandari; Mohammad Ghani; Dwi Rantini; Fikri Arif Abdillah; Adam Maurizio Winata
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 4 No. 1 (2023): Volume 4 Nomor 1 Tahun 2023
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v4i1.12130

Abstract

Peran penting pengolahan data semakin disadari karena diperlukan untuk memberikan gambaran dan informasi penting tentang suatu kumpulan data. Pengolahan data yang tepat dapat menjadi pedoman dalam pembuatan kebijakan. Perkembangan teknologi yang sangat pesat mendorong hampir semua lingkungan untuk memanfaatkan teknologi informasi secara maksimal. Menggunakan data kependudukan dapat membantu mengidentifikasi kondisi sosial-demografi desa. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan keterampilan kader desa dalam menggunakan Google Data Studio dan Microsoft Excel untuk mendukung analisis data dalam pengelolaan data kependudukan. Kegiatan berlangsung pada bulan Agustus 2022 dengan melibatkan 25 orang kader desa sebagai peserta pelatihan. Peningkatan kemampuan peserta kegiatan ditunjukkan oleh peningkatan skor post-test dibandingkan dengan skor pre-test. Dengan demikian, kegiatan ini terbukti efektif dalam meningkatkan pengetahuan dan keterampilan kader desa di bidang teknologi informasi. Adanya kegiatan ini juga mendukung tujuan pembangunan berkelanjutan (SDGs) pada indikator ke-4 dan ke-10 yaitu pendidikan bermutu dan berkurangnya kesenjangan. Oleh karena itu diharapkan setelah mengikuti kegiatan ini para kader dapat mengolah atau menganalisis data kependudukan lebih cepat dan akurat dengan visualisasi yang tepat untuk membantu mereka mengambil keputusan.
Pelatihan Analisis Data Bagi Kader Desa dan Guru Sekolah Dasar di Jombang Ratih Ardiati Ningrum; Chandrawati Putri Wulandari; Mohammad Ghani; Dwi Rantini; Fikri Arif Abdillah; Adam Maurizio Winata
Darmabakti : Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 4 No 1 (2023): Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Lembaga Peneliian dan Pengabdian Masyarakat (LPPM) Universitas Islam Madura (UIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31102/darmabakti.2023.4.1.81-88

Abstract

Peran penting pengolahan data semakin dirasa perlu untuk memberikan gambaran dan informasi penting terhadap suatu kumpulan data. Pengolahan data yang tepat dapat dijadikan acuan untuk pengambilan suatu kebijakan. Kemajuan teknologi yang sangat cepat, mendorong hampir semua aspek kehidupan untuk dapat memanfaatkan teknologi informasi secara maksimal. Pemanfaatan pada data kependudukan dapat membantu melihat kondisi sosiodemografi desa. Begitu pula untuk data sekolah, teknologi informasi dapat dimanfaatkan untuk membantu proses belajar mengajar. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan keterampilan pada kader desa dan guru sekolah dasar dalam memanfaatkan Google Data Studio dan Microsoft Excel untuk mendukung analisis data berkaitan dengan bidang pekerjaan masing-masing. Kegiatan ini juga mendukung capaian SDGs pada indikator ke-4 dan ke-10 yaitu pendidikan bermutu dan berkurangnya kesenjangan. Peningkatan keterampilan peserta ditunjukkan dengan kenaikan nilai post-test dibandingkan dengan nilai pre-test. Sehingga, kegiatan ini terbukti efektif meningkatkan pengetahuan dan keterampilan teknologi informasi para kader desa dan guru sekolah dasar.
Implementation of Appropriate Technology Used to Continuous Monitoring of Weather Conditions and Air Quality on Gili Iyang Island, Sumenep Prisma Megantoro; Nayu Nurrohma Hidayah; Muhammad Rafi Nabil Arsalan; Arya Dwi Kustiawan; Antik Widi Anugrah; Heru Dwi Cahyono; Rizki Putra Prastio; Tahta Amrillah; Mohammad Ghani; Retna Apsari
Jurnal Pengabdian dan Pemberdayaan Masyarakat Indonesia Vol. 3 No. 4 (2023)
Publisher : Peneliti Teknologi Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59247/jppmi.v3i4.118

Abstract

This article discusses community service activities that have been carried out on Gili Iyang Island, Sumenep, Madura. This activity is the application of appropriate technology, in the form of weather and air quality monitoring devices. This device is installed in two locations, namely the east side of the island and the west side of the island. The data generated from these devices can be accessed with Android smartphones by the local community and researchers. With the application of this tool, it is hoped that it can improve and advance the environmental, tourism and renewable energy sectors. In addition, this community service activity also targets training and dissemination of applied technology. Of course, the training and outreach involved the local community, which consisted of tourism awareness groups and youth organizations from the two villages on Gili Iyang Island.
Study of The Effect Stuart and Prandtl Numbers on Diamond Nano Fluid Flowing Through Cylindrical Surface Yolanda Norasia; Mohamad Tafrikan; Mohammad Ghani; Asmianto Asmianto; Indira Anggriani
Telematika Vol 16, No 1: February (2023)
Publisher : Universitas Amikom Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35671/telematika.v16i1.2103

Abstract

Fluid flow problems can be constructed using applied mathematical modeling and solved numerically using computational fluid dynamics (CFD). Nondimensional variables, stream functions, and similarity variables are used to simplify the governing equations from Newton's law, and thermodynamics law. These equations consist of continuity equations, momentum equations, and energy. Backward Euler method numerically solves the equations. The results show that the smaller the influence of the given Stuart number and Prandtl number, the fluid velocity and temperature will increase. Diamond nano fluid with water base fluid moves faster and experiences an increase in temperature faster than engine oil base fluid. this is due to the thermo-physical heat capacity of the water base fluid being greater than that of the engine oil.
ANALYSIS OF THE EFFECT OF STUART NUMBER AND RADIATION ON VISCOUS FLUID FLOW Anggriani, Indira; Norasia, Yolanda; Tafrikan, Mohamad; Ghani, Mohammad; Widodo, Basuki
Journal of Fundamental Mathematics and Applications (JFMA) Vol 7, No 1 (2024)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jfma.v7i1.22481

Abstract

Computational fluid dynamics (CFD) is a numerical solution of fluid flow problems built from applied mathematical modeling. The problem of the flow of a viscous fluid which is influenced by a magnetic field gives rise to a boundary layer, from this boundary layer a dimensional building equation is formed. The governing equation is obtained from the continuity equation, momentum equation, and energy equation, then transformed into a non-dimensional equation by substituting non-dimensional variables and transformed into a similarity equation. The numerical solution to this problem uses the Keller Box method. The numerical simulation results show that the Stuart Number increases the velocity profile, while the temperature profile decreases. The effect of radiation parameters on the velocity profile did not change significantly, but the temperature profile decreased.
SEIHR Model on Spread of COVID-19 and Its Simulation Rois, Muhammad Abdurrahman; Tafrikan, Mohamad; Norasia, Yolanda; Anggriani, Indira; Ghani, Mohammad
Telematika Vol 15, No 2: August (2022)
Publisher : Universitas Amikom Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35671/telematika.v15i2.1141

Abstract

The modified SEIR model of the COVID-19 spread is divided into five compartments: susceptible, exposed, infected, and recovered. Based on the results, two equilibrium points were obtained: the disease-free equilibrium point and the endemic equilibrium point. The existence of an equilibrium point depends on the value of the basic reproduction number R0, as well as on stability. The endemic equilibrium point exists if it is satisfied R0>1. Then, the disease-free equilibrium point is said to be locally asymptotic stable if R0<1, and the endemic equilibrium point is locally asymptotic stable if R0>1. Sensitivity analysis was performed to determine the most influential parameters in the spread of the virus. Finally, the numerical simulations determine the behavior of the model and support the results of the dynamic analysis.
Co-Authors Adam Maurizio Winata Anggriani, Indira Anggriani, Indira Antik Widi Anugrah Arya Dwi Kustiawan Asmianto Asmianto Basuki Widodo Chandrawati Putri Wulandari Denis Sospeter Mukama Dwi Rantini Fikri Arif Abdillah Heru Dwi Cahyono Indira Anggriani Mohamad Tafrikan Mohamad Tafrikan Mohamad Tafrikan Mohamad Tafrikan Mohammad tafrikan Muhammad Rafi Nabil Arsalan Nailul Izzati Nayu Nurrohma Hidayah Norasia, Yolanda Prisma Megantoro Ratih Ardiati Ningrum Retna Apsari Rizki Putra Prastio Rois, Muhammad Abdurrahman Tafrikan, Mohamad Tafrikan, Mohamad Tahta Amrillah Wahyuni Ningsih Yolanda Norasia Zulaikha Zulaikha Zulaikha Zulaikha